netdev - Re: [PATCH net-next] htb: fix two bugs

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Date:	Mon, 05 Nov 2012 18:31:54 -0800
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	David Miller <davem@...emloft.net>
Cc:	netdev <netdev@...r.kernel.org>, Vimalkumar <j.vimal@...il.com>
Subject: Re: [PATCH net-next] htb: fix two bugs

On Mon, 2012-11-05 at 13:06 -0800, Eric Dumazet wrote:
> From: Eric Dumazet <edumazet@...gle.com>
> 
> Commit 56b765b79e9 (htb: improved accuracy at high rates)
> introduced two bugs :
> 
> 1) one bstats_update() was inadvertently removed from
>    htb_dequeue_tree(), breaking statistics/rate estimation.
> 
> 2) Missing qdisc_put_rtab() calls in htb_change_class(),
>    leaking kernel memory, now struct htb_class no longer
>    retains pointers to qdisc_rate_table structs.
> 
>    Since only rate is used, dont use qdisc_get_rtab() calls
>    copying data we ignore anyway.
> 
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>
> Cc: Vimalkumar <j.vimal@...il.com>
> ---

Please hold on this patch, I'll add a check in V2 :

We should make sure rates are not zero (check is done in
qdisc_get_rtab())



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